System information (version)

• Current arch linux
• opencv 4.3.0-4
• nvidia geforce GTX 965M
• OpenCL 1.2
• Cuda 10.2.159

Detailed description

It dies with:

error: OpenCV(4.3.0) /build/opencv/src/opencv-4.3.0/modules/core/src/ocl.cpp:5853: error: (-220:Unknown error code -220) OpenCL error CL_INVALID_MEM_OBJECT (-38) during call: clGetMemObjectInfo(memobj, CL_MEM_TYPE, sizeof(cl_mem_object_type), &mem_type, 0) in function 'convertFromBuffer'

This only happens in buffer mode, not image mode

Steps to reproduce

Build all the samples (except qrcode which won't compile at 182 and 187 but that's not my blocker today) using the provided cmake and run opencl/example_opencl_opencl-opencv-interop -c silly which seems to make it use the default inbuilt webcam and wait five minutes. Don't hit space.